Seongyu-Class Battleship [1912] (Seondok)

Seongyu-Class, Seondok County Battleship laid down 1912

Displacement:
	27,395 t light; 29,400 t standard; 31,173 t normal; 32,592 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
	(597.11 ft / 590.55 ft) x 98.43 ft x (32.81 / 34.01 ft)
	(182.00 m / 180.00 m) x 30.00 m  x (10.00 / 10.37 m)

Armament:
      12 - 14.96" / 380 mm 40.0 cal guns - 1,688.52lbs / 765.90kg shells, 100 per gun
	  Breech loading guns in turret on barbette mounts, 1912 Model
	  6 x Twin mounts on centreline ends, evenly spread
		2 raised mounts - superfiring
      8 - 5.71" / 145 mm 45.0 cal guns - 95.00lbs / 43.09kg shells, 200 per gun
	  Quick firing guns in deck and hoist mounts, 1911 Model
	  4 x Twin mounts on sides, evenly spread
      16 - 5.71" / 145 mm 45.0 cal guns - 95.00lbs / 43.09kg shells, 200 per gun
	  Quick firing guns in deck mounts, 1911 Model
	  16 x Single mounts on sides, evenly spread
		16 hull mounts in casemates- Limited use in heavy seas
      8 - 0.98" / 25.0 mm 55.0 cal guns - 0.51lbs / 0.23kg shells, 1,000 per gun
	  Quick firing guns in deck mounts, 1901 Model
	  8 x Single mounts on sides, evenly spread
		8 raised mounts
      Weight of broadside 22,546 lbs / 10,227 kg
      Main Torpedoes
      8 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.151 t each, 17.209 t total
	In 2 sets of deck mounted side rotating tubes
      2nd Torpedoes
      8 - 21.7" / 550 mm, 32.81 ft / 10.00 m torpedoes - 2.151 t each, 17.209 t total
	below water reloads

Armour:
   - Belts:		Width (max)	Length (avg)		Height (avg)
	Main:	13.0" / 330 mm	383.86 ft / 117.00 m	11.91 ft / 3.63 m
	Ends:	4.92" / 125 mm	206.66 ft / 62.99 m	11.91 ft / 3.63 m
	Upper:	6.50" / 165 mm	383.86 ft / 117.00 m	8.01 ft / 2.44 m
	  Main Belt covers 100 % of normal length

   - Torpedo Bulkhead - Strengthened structural bulkheads:
		2.95" / 75 mm	383.86 ft / 117.00 m	30.74 ft / 9.37 m
	Beam between torpedo bulkheads 72.18 ft / 22.00 m

   - Gun armour:	Face (max)	Other gunhouse (avg)	Barbette/hoist (max)
	Main:	14.2" / 360 mm	8.27" / 210 mm		13.0" / 330 mm
	2nd:	3.94" / 100 mm	1.97" / 50 mm		3.94" / 100 mm

   - Armoured deck - multiple decks:
	For and Aft decks: 3.94" / 100 mm
	Forecastle: 1.97" / 50 mm  Quarter deck: 1.97" / 50 mm

   - Conning towers: Forward 14.96" / 380 mm, Aft 0.00" / 0 mm

Machinery:
	Oil fired boilers, steam turbines,
	Geared drive, 2 shafts, 46,149 shp / 34,427 Kw = 22.50 kts
	Range 7,500nm at 12.00 kts
	Bunker at max displacement = 3,192 tons

Complement:
	1,172 - 1,524

Cost:
	£2.955 million / $11.819 million

Distribution of weights at normal displacement:
	Armament: 3,318 tons, 10.6 %
	   - Guns: 3,262 tons, 10.5 %
	   - Weapons: 56 tons, 0.2 %
	Armour: 12,155 tons, 39.0 %
	   - Belts: 3,942 tons, 12.6 %
	   - Torpedo bulkhead: 1,289 tons, 4.1 %
	   - Armament: 3,846 tons, 12.3 %
	   - Armour Deck: 2,758 tons, 8.8 %
	   - Conning Tower: 319 tons, 1.0 %
	Machinery: 1,840 tons, 5.9 %
	Hull, fittings & equipment: 9,982 tons, 32.0 %
	Fuel, ammunition & stores: 3,778 tons, 12.1 %
	Miscellaneous weights: 100 tons, 0.3 %
	   - Above deck: 100 tons

Overall survivability and seakeeping ability:
	Survivability (Non-critical penetrating hits needed to sink ship):
	  37,443 lbs / 16,984 Kg = 22.4 x 15.0 " / 380 mm shells or 4.1 torpedoes
	Stability (Unstable if below 1.00): 1.07
	Metacentric height 5.6 ft / 1.7 m
	Roll period: 17.5 seconds
	Steadiness	- As gun platform (Average = 50 %): 58 %
			- Recoil effect (Restricted arc if above 1.00): 0.91
	Seaboat quality  (Average = 1.00): 1.15

Hull form characteristics:
	Hull has a flush deck,
	  a ram bow and a cruiser stern
	Block coefficient (normal/deep): 0.572 / 0.577
	Length to Beam Ratio: 6.00 : 1
	'Natural speed' for length: 24.30 kts
	Power going to wave formation at top speed: 48 %
	Trim (Max stability = 0, Max steadiness = 100): 50
	Bow angle (Positive = bow angles forward): 4.00 degrees
	Stern overhang: -3.28 ft / -1.00 m
	Freeboard (% = length of deck as a percentage of waterline length):
				Fore end,	 Aft end
	   - Forecastle:	20.00 %,  22.97 ft / 7.00 m,  19.69 ft / 6.00 m
	   - Forward deck:	30.00 %,  19.69 ft / 6.00 m,  16.40 ft / 5.00 m
	   - Aft deck:	35.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
	   - Quarter deck:	15.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
	   - Average freeboard:		17.81 ft / 5.43 m
	Ship tends to be wet forward

Ship space, strength and comments:
	Space	- Hull below water (magazines/engines, low = better): 96.9 %
		- Above water (accommodation/working, high = better): 112.6 %
	Waterplane Area: 41,416 Square feet or 3,848 Square metres
	Displacement factor (Displacement / loading): 96 %
	Structure weight / hull surface area: 217 lbs/sq ft or 1,060 Kg/sq metre
	Hull strength (Relative):
		- Cross-sectional: 0.95
		- Longitudinal: 1.66
		- Overall: 1.00
	Adequate machinery, storage, compartmentation space
	Adequate accommodation and workspace room